CVE-2026-23403

Summary

In the Linux kernel, the following vulnerability has been resolved:

apparmor: fix memory leak in verify_header

The function sets *ns = NULL on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks namespace consistency checking since *ns is always NULL when the comparison is made.

Remove the incorrect assignment. The caller (aa_unpack) initializes *ns to NULL once before the loop, which is sufficient.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 9d678eb0fe55c9195d9a253e8c5b82a87b930737affected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 6b79abcb3c985e153fcf9d395e1d4336081aabc2affected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557affected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 663ce34786e759ebcbeb3060685c20bcc886d51aaffected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 786e2c2a87d9c505f33321d1fd23a176aa8ddeb1affected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 4f0889f2df1ab99224a5e1ac4e20437eea5fe38eaffected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < 42fd831abfc15d0643c14688f0522556b347e7e6affected
LinuxLinuxdd51c84857630e77c139afe4d9bba65fc051dc3f < e38c55d9f834e5b848bfed0f5c586aaf45acb825affected
LinuxLinux3.12affected
LinuxLinux0 < 3.12unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.169 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.18 <= 6.18.*unaffected
LinuxLinux6.19.8 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References